Plier wrench



March 17, 1931. o c DAVls 1,796,888

FLIER WRENCH Filed Oct. 1, 1928 Patented Mar. 17, 1931 UNITED STATESORIN C. DAVIS, F MANISTEE, MICHIGAN rmnn WRENCH Application filedOctober 1, 1928. -Seria1 No. 309,379.

One of the objects of this invention is to provide a wrench constructedlike a pair of pliers and capable of holding with great strength, a nutor like object which is to be rotated, the construction of the jaws ofthe wrench being such that many holds may be secured on a nut, and,specifically, whereby twelve holds may be secured on a hexagonal nut, ina single complete rotation of the nut,

the tool, thus, being peculiarly useful in places wherein the wrench canbe swung through a small are only. Another object of the invention is soto construct a device of the class described that the parts of it willbe prevented from being strained or broken off.

It is within the province of the disclosure to improve generally and toenhance the utility of devices of that type to which the inventionappertains.

With the above and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed, may be made within thescope of what is claimed, without departing from the spirit of theinvention.

In the accompanying drawings Figure 1 shows in side elevation, a wrenchconstructed in accordance with the invention;

Figure 2 is an elevation wherein the wrench is viewed edgewise;

Figure 3 is a plan of the second lever;

Figure 4 is a plan of the first lever;

Figure 5 is a fragmental elevation showing a slight modification, orreversal of parts.

The wrench forming the subject matter of this application comprises amain member 1, the intermediate portion of which is denoted by thenumeral 2. At one end, the main member 1 has a handle 3. At its oppositeend, the main member 1 has a jaw 4. A first lever 15 is fulcrumed,intermediate its ends, at 16, on the main member 1. The first lever 15is provided at its outer end with a jaw 17. The jaw 17 of the firstlever 15 cooperates with the aw 4 of the main mem her 1. The first lever15 is provided at its lnner end with an arm 18. The numeral 5 designatesa second lever. A pivot element 6 connects the intermediate portion ofthe second lever 5 with the intermediate portion 2 of the main member 1.There is a handle 7 at the outer end of the second lever 5. The secondlever 5 has an arm 8 at its inner end. The handle 7 of the second lever5 cooperates with the handle 3 of the main member 1. One of the arms, towit, the arm 8, is provided at its inner end with fingers 9 and 10. Thefingers 9 and 10 define a notch 11. The other of the arms, to wit, thearm 18, terminates in a single rounded projection 19. The projection 19is received in the notch 11. The arm 18 has a reduced neck 20 definingopposed concaved recesses 21. The recesses 21 receive the ends of thefingers 9 and '10. The finger 9 is the finger which transmits the thrustto the rounded projection 19 when thejaws are closed together. On thataccount, the finger 9 is made wider and stronger than the finger 10which 7 5 is a mere guide or retaining finger for keepmg the projection19 in place in the notch 11.

The second lever 5 has spaced shoulders 12 and 14. The shoulders 12 and14 are disposed adjacent to the pivot element 6: The main 8 S0 member 1has a lug 22. The lug 22 is adapted to engage either of the shoulders12-14 of the second lever 5, thereby to limit the swinging movement ofthe second lever with respect to the first lever 15, and to prevent abinding of the fingers 91() against the neck 20, and a breaking ofeither of the fingers 9'10 or the neck 20.

The jaws 4-17 have straight inner surfaces 23 provided intermediatetheir ends 99 with oppositely extended angular notches 24 so shaped asto fit a hexagonal nut at its'corners, the notches 24 cooperating withthe straight inner surfaces 23 of the jaws to give the aws twelvegripping holds on a hexagonal nut during a single rotation of the nut.

The projection 19, thenotch 11, the fingers 9 and 10,- and the reducedneck 21 constitute whatmight be'called a semi ball andsocket joint,and-the device is' tobe distinguished 1N clearly from a structure onwhich a rack and pinion, or an equivalent structure forms the operativeconnection between the pivoted handle and the swinging jaw-carryinglever.

It is not necessary that the rounded projection 19 form part of thelever 15. Thus, in Figure 5, a reversal of parts has been effected, therounded projection 1960 being on the second lever, and the fingers 10aand 9a being on the first lever. In this form of the invention, thefinger 10a is thicker and stronger than the finger 9a, because thefinger 10a is the one that receives the thrust when the jaws of thewrench are closed together.

The handle 7 is much longerthan the arm 8, and the arm 8 is considerablyshorter than the arm 18, the arm 18 being appreciably longer than-thejaw 17. The result is that with a small pressure exerted on the handle7, the nut can be gripped with great force between the aws 4L and 17.

Owing to the specific construction of the jaws 4 and 17 whereby twelveholds can be secured on a hexagonal nut, in one complete rotation of thenut, the wrench can be used to advantage in close quarters, and with aview to facilitating the use of the wrench in places where there is notmuch room to operate it, the second lever 15 and the main member 1 areoffset, as shown at 25, so as to bring the jaws 4 and 17 into the sameplane as disclosed in Figure 2 of the drawings.

WVhat is claimed is A wrench comprising a main member provided at oneend with a handle and at its opposite end with a jaw,;a first leverfulcrumed intermediate its ends on the main member and provided at itsouter end with a jaw which cooperates with the jaw of the main member,the first-lever being provided at its inner end with an arm, a secondlever,

ORIN C. DAVIS.

a pivot element connecting the intermediate portion-of the second leverwith the intermediate portion of the main memberand forming a handle atthe outer end of the second lever and an arm at the inner end of thesecond lever, the handle of the second lever cooperating with the handleof the main member, one of the arms being provided on its inner end withfingers having rounded: ends, the fingers defining a notch, the other ofthe arms terminating in a single rounded projection received in thenotch, and having :a reduced neck defining opposed concaved recesseswhich cooperate continuously with the rounded ends of the fingersduringthe opening and closing of the -wrench, the finger which transmitsthe thrust tothe rounded projection when the jaws are closed togetherbeingwider thanthe other; finger, the second lever having spacedshoulders located adjacent to the pivot element, the main-member beingprovided with a laterally projectingreinforcing lug adapted toengage-either of the shoulders ofthe second lever, therebytoilirnit-

